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I went to a conference last month where software vendors would do an RFID scan of your conference badge. My coworker (I do not have facebook) had companies tha

I went to a conference last month where software vendors would do an RFID scan of your conference badge. My coworker (I do not have facebook) had companies that had scanned his badge show up on his Facebook advertisement feed the next day. To me, this was the real eye opener. Facebook doesn't just sell to advertisers the promise of groups of users. They can offer to sell to you, specifically, by name if they want to.

netcan 11y ago
Specifically, it's by email or Facebook ID. Most likely, your friend was targeted for advertising using Facebook's custom audiences. FB let advertisers upload a list of email addresses or Facebook IDs to show ads to. Personally, I consider this much further on the creepy scale than it is on the genuinely worrisome scale, more creepy than harmful. It's pretty creepy though, so.. relativity.
hellweaver666 11y ago
this is actually really easy - you can target adverts to anyone you have an email address for on Facebook - just upload a list of email addresses and you can "retarget" them